will hit and we begin with ktvu's lorraine lorraine blanco live in napa. >> reporter: the flood warning runs through the night and so does the sandbag operation. city workers say residents have filled 40,000 tons of sand. near the napa river many spent is their saturday blocking openings in case the river overflows its bank. as for downtown, city leaders tell us napas a years long project is two-thirds complete and believe those measures will protect the area. >> we're looking at our modeling and our flood project improvements and we're anticipating that what we have done to protect the community from flooding will keep the river in its banks within the city based on the projections of rainfall amounts. >> reporter: city leaders and member of the flood district will meet torte. if it rains more than expected they will open a emergency center to send out help wherever needed live in napa, lorraine blanco, ktvu channel 2 news. >> the russian river is also creating avenuity for sonoma county residents where the river expected to get dangerously close to flood stage in the next few hours.